Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '71037b1848123749db5af844e4d02199f0e72b97ada8701fbe6319d22aca4dd7' 
  AND token = 'DGWlWw2YX0pX7+XH7HG6O9sV775SmBAOJSt1tCY+GxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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