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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '24939e1ca4b08dcd0691960d3161b37507a3089eea2d118682bcfb45d7a262ed' 
  AND token = 'wo6pON/1yIHJj2h/pdOUiK4IFFvpWEKN6lSvc/eev7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}