Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2577024c30fd5d0628041b62ae37eef98ffa0f464889e2910b3e6e9764798277' 
  AND token = 'hmSfvnd5AylFWAkJGMWtORKjTykHCQ40dLa9dMOOo8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}