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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd619c63ca4e33d4f1320567becab85625d8148d58574323b245c61d5885de4ed' 
  AND token = '0Ai54ZmunfwK5q3fDLcq43ZgNqWn7YQdMw2liNbjWDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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