Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c004b9362818aa8a1d5ca90c5222b832bbae5ceb37f3e81f2d863e6d255762e0' 
  AND token = 'ZCdPvUUB+yb9CAU58tet3BfPVTuXOUm3hVr4mk1soTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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