Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6253b08561721231d2427c4d80b84eca29b9044fbf42abe43806fb8b3b3b73f' 
  AND token = 'j7Vp0SIpnAcEbpdP25PBld/tG2N9QqdHN+/L0bneCiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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