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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72fb343f5fb449bdb712516f1723b046997ab233e935b6e165e19c5cc12b9f96' 
  AND token = 'zVSme/EdU6gaWgkbqEcMsJDCbol3lNg7uD/gzYpXoRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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