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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0172041c6005a8788663b65e9f1f0d925fcb06315c04c28e704b71646319ab80' 
  AND token = 'Mvrr6Dnq3xpChOq/jDx924oqj+o1ONMmzAmKtOPe080=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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