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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ba1308d4262d8b9e83dd0a8b0e50f34272aca2a5fb477912438e0a1057de90cc' 
  AND token = 'I6unAzprvGJO3aXYsbclxO3/WY4x46zbqU3p5RUd324=' 
  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"
    }
  }
}