Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b528e63b19188d1f09786054a811c1b1d021f8ea813b7a7288bde1432943e84' 
  AND token = 'VZtELJBvFqv2aeNji383PetLwx3vUQ2SYTiWPsRMVKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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