Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e90c70b43a8cca32a7abe16643be189429fd93ab1ad672742d5470593f3b9f8' 
  AND token = 'FhULGqGGtLKo6H6t2MboQEGNFpM4P9qCcd39MzFYly8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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