Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af954563717d187af04ad91e20589ea24da30753ac15a512e46fe1a145bf6eb3' 
  AND token = '8TDtuHvQM5HV/pEmWiEMad2JyvOF5FuN5W46e4Kr+4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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