Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05885f13e6cc2c3753c914e5c2944de5218eb4916d54c2069b193d795073bf3c' 
  AND token = '0Oxe6tB6FTsA9F4oCqbj+Uhu2/i84JgGeixq94EdW0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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