Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f3170b71e560f1aa4e1f84b93200a51d1c5d9cecbaf3b15237e3e7c69e5b5dde' 
  AND token = 'iE4OGdsGd6nV3DhXHW9i2Z9Su0ziwhA+SZoBBHBzFog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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