Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e32fafff9247e288b5c40d2877d3476dc8ed1db8d282b1655f69296e260bb86' 
  AND token = 'sHcL2Ya+f+Z3JT3BffrnxUw3VtAJi+X9qy+qO/CR3P8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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