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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72ad5cb9b8b26c78fd6f4802c59d39cdb9cd711afba39948e3595cccd563bff2' 
  AND token = 'F5MFcuqq4QkVCjwgb2BshcMRFObv6ZaZF4yYDDouTNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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