Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6c644e84a69349d67fb5fbe4428dea8edcf4075371d53b08b055a26ea261e6e' 
  AND token = 'gosYirY+WujxTcS20mizIHd3hTMOHf3C4dQrbKL2/ZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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