Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93f96c2cb910f4502c9b0973940f77a243b9ee0a5aa1e36790fd8ec11451e3e6' 
  AND token = 'uel9+ZckWdflFV0X3KwUdbbPsk+0oOdFdMfExk1SfZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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