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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1181e73a66e301d3e4b3141bde722ebb46188559a81b4b7a4ea027814ea5b73a' 
  AND token = 'ggSQWeCg27XLKBmRtPJv4ErEYQT5VUYJdDpfKFF5XJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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