Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '256ffb9fd888ce6c87668666ecec8916272d9972bfa04f2a712bba7acd6b136e' 
  AND token = 'oDllnKhZXgsvlTCaV/p2COpZtalc6k2uJEl7QB9PlLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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