Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b275d8adb0c0d64a7ec2e3c4f11c5d73718ad0fbf19ecdbd1f8bab238471322' 
  AND token = 'eMGGB8C/75H711aET19o5awxGCUz6huC95M8ZzKlIuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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