Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ae6af333838eb946e65c55146573b132eb240c970c11b7efeb234c86236f75e' 
  AND token = 'fdOfHooLsqyJsc0W4H3CeZSx8frC5y58OdR3IY0Cg+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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