Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4adc3676a350138e57c091579230bd7b7fc462a55372146c98548672c77816e3' 
  AND token = 'FLVG8e8dV1e3S+BIKoPHM5hta9J36v3Bc7ae2smmFew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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