Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '507a0365e0e210ce682b88f73b0f302e3af78a98a361cf991c7126f19c709914' 
  AND token = 'SFoAauy3N9Wl9o++EFzltIWNz05HXX7zs24VZ6+A/dM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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