Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff3644b9ec90411bb1f2f0f5705be33dad7d88bf3febd6ce594f941e5bad7b2b' 
  AND token = 'HEqRTzcS6NObkqzZctvbk883Swj18iwmXO0MMFdf0pE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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