Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60743750b2163fd2123588b5d50437270510463be118e424935fc5a1f244a434' 
  AND token = 'cykT/bGwBVMXPFP+5Kn/H7L1eCPWgE43XDtnUxrgIhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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