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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eefc72d7ae3ffefabea3ac51236898d7e3428082c9683560c256f51aec36c17' 
  AND token = 'wHbDb1PbeKUomJFcpSnF4vfqRZfLQSTC5mBCGDWcIHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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