Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5e4d4f47583be932812893ec9f369bad06601faf2989eff702e15e50c58753a' 
  AND token = 'WI4XWJ60h79cVeDiIDbPnlvV+KQomtl4lDq+byWarPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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