Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9429babfaa2b281d939389a0753abd13444b7e4b6d74a8bacd0a70aa86d42ad1' 
  AND token = '9LAKdgz3m2Jqt0hIcUr5r0CrIvG8vVeVsCaSDcwzGnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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