Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '814dde1bea774629c1dfb7cb83eb4ed7b60e66797632247f5a616f2e4694f896' 
  AND token = '+VR53XuhwnyqveRMejyaZb8OE7d+Gl3AYDoQUim5Ybs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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