Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be2e07a920ff59794523226cd715363cdeff595b5719aa3c04cd75fb41d82aec' 
  AND token = 'BSv8UPxF6zKTb1JgPppXbpO2EfnEnwYdLA1g/HkLXXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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