Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9068f4e49767e0627fc1533a1b85b58419d6ad24863a7a6e38d4044b136de9bb' 
  AND token = 'Qo2ykElc41BAkPTs8DxUVYkz2Uy9y1r4Mdt7AtizoGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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