Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa0210ed0141051a3cc5ebe508343a8c94be123898509d00b99d618a0e0e2fca' 
  AND token = 'uDHbekT0hePHJba5P5kAzig7xIFvTf0BiN0umLBDTGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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