Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ffddcb5243f8e2043938c80d5f54523c61974680332b3ee5378c4b5ecf0b9101' 
  AND token = 'OCIxCLa3cRt2BXPKbYGbF2E5IGZ7/pXe0IdaCPSRZBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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