Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a92dea2e92905f407fd606f58682e2bde3470c5d087f7e0bf1940d0afb29d9b' 
  AND token = '6/Y8WfiflqySojVgQOm2TtlUUpj4jud7+Qrw9p8tJic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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