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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12b44df7cb677145cbdb274e5b0e237605132a58a0cdfb428d7ab6f55416ed4e' 
  AND token = 'bMc2Ul3F1ZRef6ytTPmFsiZC+eX1t7H0hVEhyTdz9Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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