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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '69aa53b61f1406c2b70367a6ea6e33c5ad389b3eff82fb8f7ab518cba9306ada' 
  AND token = '+uxuGNmulKHYYaRF3EybCxfPVmpd03xvJd+dGBAyyp4=' 
  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"
    }
  }
}