Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a795d53f2299e9049ad0a0c231fb3499889465856e0057b5547969302bc9bbbd' 
  AND token = 'Dyydw9RGEdtnrQrJHJL2dVCf4j69DOQwWwEspAy/uoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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