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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'aace774c4bab33e44e41a77c0d26ea73e51d2c108e37aa4d37a92ebbef36d4df' 
  AND token = 'doQnTVHdPcNOXSVQRuIEpfPfFmZ+8tIJMm0XimF76po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}