Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1db8aaf1daaa705c61ed88c08853557ea3a3696859e6e7bd3b0e08a8057f567' 
  AND token = 'FTv2+iUpAuDTsUwYPd0dyH8Dic/hr9gN2IUt6B8wZ3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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