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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801b17c02f8f325abb9ce8c2827edf505344d1c0bf4f8926983b47c96c8cdeae' 
  AND token = 'b9ha1H06iSVvJF2f/8RNyzB3M8m4NQFFBALE5rX8KOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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