SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80ace3f7ea3eeed76e0454df16601c93feb29fd50300391a3bd3e488682d242b' 
  AND token = 'NqGFVmvQ1JKphy4JmCsreeWodFyV8nL5NoBTZhKFDqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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