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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e373306853801660b0980b4aa9f6f7058c0ffa1cd5d5af6306f6616750d08e' 
  AND token = 'W5Jw7k1jqjAnO+sniNPO6VTTf9pgxcC8e2fvQBLesiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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