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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7acf00dabb732c60ef23b9a003dbee986824aee9d9e09abe1cb9a4f1e328ccdf' 
  AND token = 'J0pVeF5KZTvQ/dwoAXk7K3PYalaFedOLjEKQr5vTI0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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