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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b44355291eed85d5a16964fd4ed3bfcfc462acd097bb49dfc412ffd00d7ecd7' 
  AND token = 'qIFm/YT/SGysTe2fuKncUOT4FjA4wkaZB2fRcjN+Cao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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