Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6405d83e4904991af8811d57bb6381321171238a4070dd49806735a51e8d647' 
  AND token = 'PW10Z3/O1hoEKyPQZsAVb2wNrsNMiqA2tUrkpmkwEaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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