Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd30e3914d8e66b0b0ec311b80f620fef55b3a21d421e72ca219ac4849ad7d164' 
  AND token = 'L3AhxOEi9wkmbZ5zmxUhxjMl+OS6SNnkjXnjrv4ReKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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