Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d4a09441bda88bc4349eb473ab56747dd3bca14ff4775da4a105717e141a41' 
  AND token = 'LEL5hiKJ09meznB3KNtpuXcTEr3a8+gxOyX9Flt8J6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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