Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c49f8fa91a8460d6c7282f8cafaf7431d4f2d4b15a15629f02165dfd5ec97b7c' 
  AND token = 'NZCi9ODegy+COofn/Zg3LdjUHGBV/AxS5RPkOrKetrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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