Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009a519048c62662b03d65951107af623456df5df456d29c401cb13c1eba4005' 
  AND token = 'JxLxDf0oPD/UqG33eKkMhYiq0oApqFkkQEhlQH0kWzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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