Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6132f21ed1a6cd3e0661448539223ad18c39e7556bdaf2cfe6586ca3770cf9a' 
  AND token = 'iFTZQK5w2vL+5mrCtNol2xOdjltoi6KfDXrhowNOiXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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