Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51602803b0e72da152c6885c55d11c1b24abe7a9917c52a56aa728533173232c' 
  AND token = 'z4Fd+cPgC1/VbM5P+b3B2PlkAotKLlzPSWzKZ4lFz+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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