Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81eee49b58a71a76785976866fcf637041dd628c79b0748d2745da7f36bb4d0f' 
  AND token = 'oOFBp1QHyFdYHTkahlW3F9GDRXjnC0Pd7rw7YVsDJCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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