Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02a3895fccbc5b0072b6bba8db71140a5045088ad794f28138d636b7a7eae12b' 
  AND token = 'd+fyoNtC9cNVj7Yb5teUdIIXL17L4DNiqtwtVsivDMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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