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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ae53b5b2b2b1ed0c84ef3c8090b0b0f75cc8d4bec9743ced0db1a7dab7311ad' 
  AND token = '64P4DITWkMy7R8Z5CPFQNWR8iuEInkJw+lFnuNRCFLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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