SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e22fab9cf6c6c1076e60ae63e8322d92d3bf1ea73fcad9928af2478ea8b5895' 
  AND token = '69E2tHyMm0Bs3m64EofR9c0FrUKRSkjlelsGCn/lreo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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