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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07c762a92c25f537cc884937d3e8a0e8cff86cfc097c8b564315953e63dd169' 
  AND token = 'ZJA9QJpLQHzcsDbqEAoYqFR9A9fkok0lr0Xh2S4KkyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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